The Bristol Aluminium Sketching Easel from Winsor & Newton is a lightweight and folds up into a hard shell carrying case. The case has a handle and shoulder strap for ease of use.
At only 0.95.6kg (2lbs 10oz) it is extremely light. For a small easel it can also hold a canvas with a maximum heigh of 137cm (54").
The controls are easy to use and of a reasonable size so not too fiddly. The telescopic legs move easily and it is no surprise that this is a best seller for Winsor & Newton.